2AM: I wonder if the table saw will wake the kids...

[10bulls]

Originally Posted by santiniuk Like Mr Beans, It's a stiffy too

hmmm....I must just have worn mine out by over use.

The 6001 bearing looks replaceable, I figured out how to get the end part of the shaft out. There is a spider coupler one end that looks like it unscrews and circle clips holding the bearings on (the top bearing will need to some off too).
I've attached a picture.

BTW: I just checked my trend router and the slop in that is nearly 1mm

I'm glad you turned up Mr Santini, you're just the man I need!

I've got a tube of BTA16 triacs sitting here. I've also just pulled apart my trend and the speed controller in that is a BTA06 with some sort of RC timing circuit.

I was thinking of taking the two motor leads off the BTA06 triac (pins 1 & 2) and feed that into the powerlead of the baby grinder.
This is just to get me out of a hole until I get round to making a pic based pwm controller using the BTA16 and mount in in my driver box.

OK chucky egg, nice to see you're up and at 'em

[santiniuk]

Andy,

The BTA06 are 6A devices and should be more than adequate for that little spindle you have.

As you say swapping the output leads over should work fine. You may find the the speed range isn't linear when you turn the pot but it should get you out of the mess your in

Good luck.

[greybeard]

Originally Posted by 10bulls Do you ever get those jobs that you start and it ends up becoming six or more?

Or as we say here "... and this is the house that Jack built".


John

[10bulls]

I'm back in action! I gutted the trend and procured the speed controller. This does indeed work fine with the die grinder. I have a working spindle again and a nice tight one at that! Thank you very much Santini, you're flasher than michael jackson!

I also found out my pic triac experiment I made over 6 years ago.
I think all I need to do is replace the weeney triac with the BTA16 and it should work! I can then work on the firmware to handle PWM signals rather than the up and down buttons at present.

Right! Tick! What's next on the list?

[10bulls]

I finally made some progress getting my steel work plate milled and drilled.

I've done a bit of a write up of it here...

http://www.brusselsprout.org/CNC/steel/

I did make rather a meal of it, but I did use the excercise as a test bed for some of the new features I've added to the latest version of CamBam.

And remember...I snap my tools so you don't have to!

[10bulls]

I finally got around to upgrading my M8 leadscrews to M12 and put on some nice shiny new AB nuts (thank you MrBean!).
And once again, the machine is helping to upgrade itself.

There has been much improvement and I'm keen to press on now with some other upgrades I have planned.
Y backlash has gone from a good percent of a millimeter to 0.004mm.
Y speed has gone from 200mm/min to 420mm/min.

More gory details and shaky video can be found here
http://www.brusselsprout.org/CNC/sma...leadscrews.htm

[10bulls]

I recently splashed out on a shiny new spindle from Germany.

A Kress 1050 FME Fräsmotoren from these guys http://www.cnc-plus.de/.

I was a bit worried when I heard reports of someone having problems with noise and bearings.

As it turned out, this is a wonderful motor.

It is very quiet and the constant speed controller keeps the rpms constant even at low speed under load.

The bearings are very tight and one test I put it to was to finish resurfacing my construction grade steel worktop. I decided not to pansy about this time and took off a 0.5mm pass with a nice new 6mm carbide bit, coolant, gave it plenty of welly and stood well back. The finish is not brilliant, but with 1/3mm Z backlash and flex, not too surprising. But the kress stood up well and shifted off the crusty top layer with ease. The worktop has gone from being rather humped to usuably flat and rather shiny.

The thing that really sold it to me was the collet range. From 2mm to 10mm, I can use my 1/8th 'turbo shank' bits, 6mm end mills, 1/4" wood router stuff, then 8mm and 10mm collets for more serious stuff. My dial indicator fits the 8mm collet with ease, allowing me to calibrate my machine much more easily than before. With 10mm I could use slit saws or even my boring bar from my lathe. Great adventures await! .

Best of all was the great service from www.cnc-plus.de. My emails were answered promptly. The goods were with me in around a week. And to top it off, they even included some sweeties and a pen. I was even in the good books with the kids and the missus (she loves pens).
I give them a 5 banana rating [ ] rating

I am in no way affiliated with kress or cnc-plus.de. I'm just zis guy...you know?

Oh, and before you ask epineh, the answer is 'Yes'.

[Mike F]

I'm glad you are pleased with your purchase. It may well be that the 1050watt version is better and has better bearings than the 500watt version I had, and don't forget, it was some five years ago I was using mine, and I did put it through some pretty arduous projects. I hope yours holds up well and I am sure the extra power will help enormously.

Good luck - 0.5mm in steel that's a lot even if you're cutting very slowly. What was your cutting speed?

Mike

[10bulls]

Originally Posted by Mike F It may well be that the 1050watt version is better and has better bearings than the 500watt version I had, and don't forget, it was some five years ago I was using mine...

Yes, and also individual machines do vary. My dewalt die grinder is a lovely piece of kit, but of a few people I know using them without problems, I'm the only one who had bearing problems. Bearings are cheap though, I have a couple of replacements and just need a few moments to fits them.

Good luck - 0.5mm in steel that's a lot even if you're cutting very slowly. What was your cutting speed?

From memory I was starting at 80mm/min, but used feed override to take it to 120mm/min. The biggest limiting factor was noise. Much faster than that and the whole house gets headaches, especially as the cutter dulled. I needed to be a bit aggressive, to get under the outer crust of steel. Too light cuts and the cutter tended to just ride up over the steel making horrid screechy noises.
As soon as my carbide cutter collection replenishes I want to make some more interesting pieces in some better quality BMS stock I have lying around.